From all I have stated, the great importance of these countries, to open an intercourse with the interior of Africa, must appear. On the borders of the Rio Pongo, and other rivers, excellent lands, forming hill, and dale, are every where to be found, and well adapted to agricultural experiments. With the _consent of the chiefs_, these might be obtained at a small expense, and many of them with whom I have communicated, would gladly embrace a wise interference; but they all complain, "white man not know their fashion," intimating in very forcible language, that every caution should be used, at innovation upon their laws, customs, and manners. Let example first excite their admiration, and their barbarism will bow before the arts of civilization, and slavery be gradually abolished. Before I conclude this chapter, I shall make some observations upon the temperature of the western countries of Africa, situated between Cape Verde and Cape Palmas, mention the principal diseases, and those which Europeans are most exposed to on their first arrival in these countries, and give general precautions against the dangers of the climate, &c. The inexhaustible fecundity of Africa holds out to Europeans strong excitements to enterprise and research; but in the pursuit, the diseases which prevail in this country should be well understood; and it would be highly expedient, in any plans of colonization, to attach a medical staff, as the natives have no idea of the art of surgery, except what arises from the knowledge they have of the properties of herbs, and the superstitions attached to their fetishism. In annexing this extraordinary country to the civilized world, and exploring its stores of wealth, a burning climate, and the diseases peculiar thereto, unite with the barbarism of its inhabitants in opposition to the European; but by a strict observance of necessary rules, and avoiding all kinds of excess, the formidable influence of the sun may be resisted, and the pernicious effects of exhalations, which arise from a humid, marshy, and woody country, may in a great degree be obviated; and I am sorry to say, that for want of proper precaution and through ignorance, fatal consequences more frequently occur, than from the unhealthiness of the climate. The temperature from Cape Verde to Cape Palmas is extremely various from the vertical rays of the sun, the nature of the soil, and the face of the country. In the months from November to March, by Fahrenheit's thermometer, it has been from 70° in the morning, to 90° at noon, in the shade; and nearly the same variation has been observed at the river of Sierra Leone; and in some places in the Foolah country it has been from 50° to 90°